* This set is hit-and-run.
* Hi Jump Kick always 2HKOs Bronzor without any previous damage!
* As long as it doesn't get hit by anything relatively strong, it's undefeatable.
* Drain Punch helps recover Life Orb recoil that Regenerator doesn't catch, plus it's Mienfoo's strongest accurate attack.
* U-turn is pretty strong and lets Mienfoo scout and attack and the same time, plus recover! How excellent.
* Fake Out lets Mienfoo further improve the "hit-and-run" strategy by acting as a priority move, revenge killing move, and general damaging attack.

[ADDITIONAL COMMENTS]

* EVs are for maximum power and Speed. The idea is to not get hit, so defensive investment to the extent where Mienfoo needs to sacrifice its offensive stats isn't ideal.
* Hidden Power Ice kills Gligar when Mienfoo has Life Orb so if you want to use it you can.
* Choice Band over Life Orb with Stone Edge or something over Fake Out can work; just watch out for being locked into Hi Jump Kick, since it invites Misdreavus to set up.
* Payback I guess since you have a small chance to survive Misdreavus' offensive pursuits.